====== Tutorials ======

===== Login to the lab's computer =====

Please, follow these links to establish the login to the lab's computers:
  * [[https://cyber.felk.cvut.cz/study/computer-labs/|https://cyber.felk.cvut.cz/study/computer-labs/]]
  * [[https://cw.felk.cvut.cz/password/|https://cw.felk.cvut.cz/password/]]

===== Remote connection to a lab's computer =====

1. Connect to the ''turtle'' server using the login ''student'' and password ''xxx'':
<code bash>
tomas@laptop:~$ ssh student@turtle.felk.cvut.cz
</code>
It will ask you for your personal login (the same on as in the lab).
Furthermore, it will ask you to pick a classroom, from which you should choose ''E230'', or ''E132'':
Finally, the script will log you into a computer.
You will be prompted if the given computer needs to be booted first. Give it some time in such as case.
For the sake of this example, I was given the computer ''e132-06''.

2. Start the [[https://xpra.org|xpra]] remote desktop app on the remote computer:
<code bash>
bacatoma@e132-06:~$ remote-desktop start xpra
</code>
**Start the server only once!!!**. You won't be able to connect to it if more instances are running. Check for running xpra instances by:
<code bash>
bacatoma@e132-06:~$ ps aux | grep '[X]org-for-Xpra'
</code>
... and eventually kill them by
<code bash>
bacatoma@e132-06:~$ pkill -f Xorg-for-Xpra
</code>

3. Install [[https://xpra.org|xpra]] on your local machine for Ubuntu, issue:
<code bash>
tomas@laptop:~$ sudo apt-get install -y xpra && pip3 install pynotify
</code>

4. Launch [[https://xpra.org|xpra]] on your local machine:
<code bash>
tomas@laptop:~$ xpra
</code>

5. Connect using the SSH->SSH proxy option. The first (proxy) server is the ''turtle.felk.cvut.cz'', and the second (computer) server is the one given to you in the last step. Use you personal login and password for both. The program will ask you **twice** to confirm "yes" while logging in.
 
{{:courses:mrs:tutorials:xpra.png?nolink&400 |}}